Method of forming metal zipper teeth and forming device thereof

Abstract

A method for forming metal zipper teeth includes following steps: a step of forming embryonic teeth, a material wire being stamped and cut by way of an upper blank mold and a lower blank mold to form embryonic teeth detaching from the material wire; a step of corner cutting, redundant material at two outer ends on the open end of each of the embryonic teeth being removed by way of an upper corner cutting mold and a lower corner cutting mold so that almost finished zipper teeth can be obtained; and a step of forming, each of the almost finished zipper teeth being worked to have a tooth recess at the top thereof and a tooth jut at the bottom thereof by way of an upper forming mold and a lower forming mold and finished zipper teeth being complete.

1 . A forming device of metal zipper teeth, comprising: 
 a blank mold, providing an upper blank mold and a corresponding lower blank for stamping and cutting material wire as embryonic teeth with approximate shape of the zipper teeth;    a corner cutting mold, providing an upper corner cutting mold and a lower corner cutting mold for removing two front ends of an open end of each of the embryonic teeth;    a forming mold, providing at least an upper forming mold for stamping a tooth recess in each of the embryonic teeth and a lower forming mold corresponding to the upper forming mold for forming the tooth recess with the upper forming mold; and    a rotary mold base, being disposed with the lower corner cutting mold and the lower forming mold and being capable of turning a preset angular displacement.    
   
   
       2 . The forming device of metal zipper teeth as defined in  claim 1 , further comprises a cord holding device for formed zipper teeth being joined to a cloth cord.  
   
   
       3 . The forming device of metal zipper teeth as defined in  claim 1 , wherein the respective lower forming mold is disposed at an equiangular position on the outer edge of the rotary mold base.  
   
   
       4 . The forming device of metal zipper teeth as defined in  claim 1 , wherein the lower corner cutting mold is disposed on the rotary mold base.  
   
   
       5 . A method for forming metal zipper teeth, comprising following steps: 
 a step of forming embryonic teeth, a material wire being stamped and cut by way of an upper blank mold and a lower blank mold to form embryonic teeth detaching from the material wire;    a step of corner cutting, redundant material at two outer ends on the open end of each of the embryonic teeth being removed by way of an upper corner cutting mold and a lower corner cutting mold so that almost finished zipper teeth can be obtained; and    a step of forming, each of the almost finished zipper teeth being worked to have a tooth recess at the top thereof and a tooth jut at the bottom thereof by way of an upper forming mold and a lower forming mold and finished zipper teeth being complete.    
   
   
       6 . The method for forming metal zipper teeth as defined in  claim 5 , further comprises a cord holding step to allow the finished zipper teeth at the respective open end thereof holding a cloth cord and form a zipper strip.  
   
   
       7 . The method for forming metal zipper teeth as defined in  claim 5 , wherein the step of forming can be operated a plurality of times by way of the lower forming mold being disposed on a rotary mold base with an equiangular position to turn a preset angular displacement and the forming molds can be corresponding to each other and the zipper teeth are formed sequentially.  
   
   
       8 . The method for forming metal zipper teeth as defined in  claim 5 , wherein the material wire is made of aluminum or copper.